Troubleshooting - Lenovo U31-70 User Manual

Hide thumbs Also See for U31-70:
Table of Contents

Advertisement

Chapter 4. Troubleshooting

Troubleshooting

Display problems
When I turn on the
computer, nothing appears
on the screen.
When I turn on the
computer, only a white
cursor appears on a blank
screen.
The screen goes blank
while the computer is on.
Sleep problems
The critical low-battery
error message appears,
and the computer
immediately turns off.
The computer enters sleep
mode immediately after
Power-on self-test
(POST).
Note: If the battery pack is charged and the temperature is within range, have the computer serviced.
The computer does not
return from sleep mode,
and the computer does not
work.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
If the screen is blank, make sure that:
- The AC power adapter is connected to the computer, and
the power cord is plugged into a working electrical outlet.
- The computer power is on. Press the Power button again
for confirmation.
If these items are properly set, and the screen remains blank,
have the computer serviced.
Restore backed-up files to your Windows environment or the
entire contents of your hard disk to its original factory contents
using the Lenovo OneKey Recovery System. If you still see
only the cursor on the screen, have the computer serviced.
Your screen saver or power management may be enabled.
Do one of the following to resume from sleep mode:
- Press any key on the keyboard.
- Press the Power button.
- Press F9 (
LCD screen has been turned off.
The battery power is getting low. Connect the AC power
adapter to the computer.
Make sure that:
- The battery pack is charged.
- The operating temperature is within the acceptable range.
See "Chapter 2. Use and care Information" in the Lenovo
Safety and General Information Guide.
If your computer is in sleep mode, connect the AC power
adapter to the computer, then press the Power button.
If the system still does not return from sleep mode, stops
responding, or cannot be turned off, reset the computer.
Unsaved data may be lost. To reset the computer, press and
hold the Power button for five seconds or more. If the
computer is still not reset, remove the AC power adapter.
22
) to confirm whether the backlight of the

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents